Build Macs. In a major faux pas, CEO Tim Cook tweeted (with 46 tweets total) some pics of the assembly line in Austin, Texas. And what do we see? iMacs running Windows. From PCWorld.com: Well, thereâ€™s apparently one good thing Microsoftâ€™s Windows is good at: running the software necessary to manufacture Appleâ€™s Mac computers. And the messenger of this information? Apple chief executive Tim Cook himself. On Thursday, Cook tweeted a photo of himself touring Appleâ€™s Austin, Texas production line where the Apple Mac Pro is manufactured: The problem? Right behind Cook is an iMacâ€”and itâ€™s clearly running Windows. Cook apparently didnâ€™t notice his glitch. This could be a case of Twitter naivete, as Cook only has 64 tweets to his name, and he may not realize the full impact of his Twitter megaphone. His photos are favorited and retweeted thousands of times, but just a few people noticed the Windows issue. Those people, however, began commenting upon it. tim cook line closeup Twitter â€œMade in America, with Microsoft Windows (look closely),â€ Steven Webster tweeted. â€œ@PeterrWLFC @ryandolan123 Macs are made on Windows which then allows android to be made on the mac. â€ user RBXcmn65 added. It wasnâ€™t totally clear whether the PC in question was running Windows XP or Windows 7, although most commenters were leaning toward Windows XP. It also wasnâ€™t clear what application it was running. Itâ€™s certainly possible that Windows was being used to run electronic design automation (EDA) software, or some other embedded analysis program that Appleâ€™s developer base has passed over. What is clear, however, is that Appleâ€™s airtight PR machine sprang a leak, and right from the very top. (This wouldn't be the first time a high-tech exec committed a highly visible gaffe, and it won't be the last.) Ironically, Cook himself took some potshots at Microsoft during the Appleâ€™s WWDC speech, mocking Microsoft for poor customer adoption of Windows 8 relative to OS X Mavericks. â€œThis is the fastest adoption ever of any PC operating system in history,â€ Cook said of Mavericks. Maybe so, but Appleâ€™s assembly line could certainly use a copy. Twitter feed: https://twitter.com/tim_cook/status/474935247335743489/photo/1 Discuss.